StackOverflow2013

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copied!<p>I had a problem like this and the work arround was loading the texture without the glktextureloader.</p> <p>Here some code for loading the texture without the GLKtextureLoader:</p> <pre><code>bool lPowerOfTwo = false; UIImage *image = [UIImage imageNamed:@"texture.png"]; GLuint width = CGImageGetWidth(image.CGImage); GLuint height = CGImageGetHeight(image.CGImage); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); void *imageData = malloc( height * width * 4 ); CGContextRef context = CGBitmapContextCreate( imageData, width, height, 8, 4 * width, colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big ); CGColorSpaceRelease( colorSpace ); CGContextClearRect( context, CGRectMake( 0, 0, width, height ) ); CGRect bounds=CGRectMake( 0, 0, width, height ); CGContextScaleCTM(context, 1, -1); bounds.size.height = bounds.size.height*-1; CGContextDrawImage(context, bounds, image.CGImage); GLuint lTextId; glGenTextures(1, &lTextId); glBindTexture(GL_TEXTURE_2D, lTextId); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData); if(!lPowerOfTwo) { glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ); glGenerateMipmap(GL_TEXTURE_2D); }else { glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE ); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE ); } CGContextRelease(context); free(imageData); </code></pre> <p>The lTextId variable has the opengl Texture Id.</p> <p>Note: if the texture dimension is not power of two, the texture will be shown black if the GL_TEXTURE_WRAP_S and _T are not set to GL_GLAMP_TO_EDGE</p>

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